Greater London · England

Floor Joint Sealing in Streatham

Floor joint sealing for Streatham, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.

  • Gaps at thresholds between rooms
  • Caulk that has cracked where the floor moves
  • Rigid edge joints in tiled floors

Floor joint sealing in Streatham

Common questions in Streatham

I let a flat near Streatham station. Can you help?

Yes, rental work is part of what we do. You can call 0345 464 0079 or send us an email with the address and a few details, and we will give you a fixed price before work begins.

Can parking be tricky for a visit in Streatham?

Parking in Streatham, as in most of London, takes a little planning: a visitor permit or a nearby bay makes the day run more smoothly.

Can grout be replaced with sealant on a tiled floor?

Often, yes. A crack along a grout line often means the floor needs room to move. We replace that grout with a flexible joint.

Do I have to be there?

Access is agreed with you when the job is booked. For inside work, that normally means someone being in.

Will you leave a mess?

Not at all. We work neatly, protect the area around the joints and tidy up afterwards.

Do you take out the old sealant first?

Yes. All of the old material is cut out and the joint cleaned.

Will there be a smell?

It depends on the product. Some products have a noticeable smell, others very little, and any smell fades as they cure.

What do you put in the joint?

Quality sealants from brands including Arbo and Everbuild, chosen to suit the joint. We explain the product when we quote.

Floor joint sealing for homes and businesses in Streatham

Thresholds are where two floors, or a floor and a door, meet. We seal them with a flexible sealant suited to the floor finishes either side so the joint stays neat. Common call-outs are for open joints around bathroom floor edges and perimeter joints in tiled floors filled with grout, across skirting boards, thresholds and commercial floors.

From brand-new flats to converted terraces with new flooring, London has every kind of floor. Every joint between floor, skirting and threshold has to cope with some movement.

We stand behind the work with a one-year guarantee, so you are not left on your own once the job is done.

Mr Mastic applicators lined up beside the company vans, one holding a sealant gun
Place
Streatham (SW16, SW2, CR4, SW12)
Wider area
Greater London
Cover
One year on every job
Price
A clear price before any work starts
Call
0345 464 0079
Last updated
26 October 2026

Common problems we fix in Streatham

Floors and walls move a little with the seasons. Heating dries timber and opens gaps along the skirting and they change again in summer.

Most people get in touch after spotting one of these:

  • Tiled floors with no room to move
  • Gaps between floors and kitchen plinths
  • Floor edges that trap water and grime
  • Skirting caulk that keeps splitting

Community buildings like St Leonard's Church are part of the picture too: floor and skirting joints in halls and kitchens wear like any others.

Comparing quotes

  • When the joint can take water or movement
  • Which colour the sealant will be
  • What guarantee comes with the work
  • What preparation is included

How to choose a mastic man

Surface by surface

Wet room and bathroom floors

Mop water gets into any open joint at the edge of a bathroom floor. A flexible seal stops water running into the gap.

Commercial floors

Commercial washrooms and kitchens have floor joints that get wet constantly. They’re resealed with a flexible, water-resistant sealant.

What we do, step by step

Every visit runs the same way: we look at the joints together, mask and protect the surrounding surfaces, do the work and clear up. It normally takes a few hours for most rooms, longer for large commercial floors. In a London area like Streatham, the main things to plan are parking and access: let us know about parking, the floor we’ll be working on and any lift or shared entrance.

  1. We start by checking the floor, the joint and what traffic it takes.
  2. We remove what’s in the joint now.
  3. The joint is vacuumed clean and backing fitted where needed.
  4. We apply the sealant in a colour that suits the floor.
  5. The joint is tooled neatly and the cure time explained.

Before we arrive

  • Mention any leaks or damp you’ve noticed
  • Try not to wet indoor joints just before the visit
  • Let us know about earlier repairs to the joints

How to get a quote

Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we’ll talk you through what we’d do. When it suits you, call 0345 464 0079 or email us.

Get a price

Read more

Looking after it afterwards

Aftercare is simple:

  • Cone off fresh joints until they’re ready
  • Keep dirt out of the joints
  • Avoid sloshing water against skirting
  • Get cracks along tile grout lines looked at early

Keep heavy traffic off resealed concrete joints for the cure time we give you. Cone off the area if needed while it cures.

A tiled floor that cracks along a line will keep cracking until it can move. A flexible joint added early helps protect the tiles themselves.

Why it’s worth doing now in Streatham

Not every floor joint takes the same sealant: skirting and tiled floors need flexibility, wet areas need water resistance and concrete needs a product suited to wheels. Using the wrong one is why many floor joints fail. In London conversions, one flat’s bathroom is often above another flat’s ceiling, so a small leak from tired sealant can mean a neighbour’s ceiling and a lot of disruption. Putting it right early is much less trouble.

No two jobs are quite the same, so each one gets its own quote. Size, access and the product the joint needs all play a part.

Why book with us

  • We are fully insured
  • 4.9 on Google from 180+ five-star reviews
  • Homes, businesses and hotels
  • Every job guaranteed for a year

Read what affects the cost and our reviews.

Floor joint sealing around Streatham

Floors around Greater London run from suspended timber in older homes to concrete in newer houses and units, and each moves in its own way. The joint at the skirting or threshold has to allow for that. Much of London’s new housing is flats in larger developments, where snagging may go through the developer or managing agent.

As a London address, Streatham can be tricky for parking: let us know about parking bays, permits or a driveway. If you let a flat or house near Streatham station, a tidy floor and skirting joint helps a rental look ready for the next tenant.

Streatham is about 5 miles south of London, in Greater London. Whether you’re in the middle of Streatham or further out, we cover floor joint sealing for every kind of property, from flats and houses to offices and hotels. Our area takes in 764 places across Greater London, large and small.

All of SW16, SW2, CR4 and SW12 is covered for floor joint sealing, from the main roads to the quietest streets. Floor joint sealing is available to properties on Stanthorpe Road, Gleneagle Mews and Madeira Road. Streatham is on the A205 and A216, so it’s easy for us to get to. Nearby, we also carry out floor joint sealing in Streatham Park (1 mile west), Furzedown (1 mile west), Streatham Hill (1 mile north), Hyde farm estate (1 mile north) and Grange Mills (1 mile north-west). Further out, we also cover London (5 miles north), City of Westminster (6 miles north), Marylebone (6 miles north), Kensington (6 miles north-west), St Pancras (7 miles north) and Shoreditch (7 miles north).

Local landmarks in Streatham

In Streatham, that means homes and buildings near Bishop Thomas Grant Catholic Secondary School, Streatham Common and Waldorf School of South West London, among other places. Streatham has its own railway station: Streatham station. Well-known places in the area include Clockworks Museum (1.1 miles east) and Southside Wandsworth (3.3 miles north-west). Not far away are Knight's Hill and Battersea Park Lake.

Map of Streatham © OpenStreetMap contributors

Work for landlords, hotels and businesses

We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.

In hotels, rooms out of use cost money, so we plan the work room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.

What we can’t put right

To be straight with you, some problems need a different trade:

  • Cracked or broken concrete slabs
  • Floors that are uneven or need levelling
  • Large cracks that need a surveyor

Not sure which it is? You can ring 0345 464 0079 or send us an email and we’ll tell you honestly.

What we seal

  • Commercial floors
  • Thresholds
  • Wet room & bathroom floors
  • Tiled floors
  • Skirting boards
  • Concrete floor joints
20+ yearsMastic and sealant specialists
ARBOMaster approvedApproved applicator for Arbo sealants
Fully insuredDomestic, commercial and hotels
One-year guaranteeOn every job